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/*
* CAN bus driver for Bosch C_CAN controller
*
* Copyright (C) 2010 ST Microelectronics
* Bhupesh Sharma <bhupesh.sharma@st.com>
*
* Borrowed heavily from the C_CAN driver originally written by:
* Copyright (C) 2007
* - Sascha Hauer, Marc Kleine-Budde, Pengutronix <s.hauer@pengutronix.de>
* - Simon Kallweit, intefo AG <simon.kallweit@intefo.ch>
*
* Bosch C_CAN controller is compliant to CAN protocol version 2.0 part A and B.
* Bosch C_CAN user manual can be obtained from:
* http://www.semiconductors.bosch.de/media/en/pdf/ipmodules_1/c_can/
* users_manual_c_can.pdf
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef C_CAN_H
#define C_CAN_H
/* c_can IF registers */
struct c_can_if_regs {
u16 com_req;
u16 com_mask;
u16 mask1;
u16 mask2;
u16 arb1;
u16 arb2;
u16 msg_cntrl;
u16 data[4];
u16 _reserved[13];
};
/* c_can hardware registers */
struct c_can_regs {
u16 control;
u16 status;
u16 err_cnt;
u16 btr;
u16 interrupt;
u16 test;
u16 brp_ext;
u16 _reserved1;
struct c_can_if_regs ifregs[2]; /* [0] = IF1 and [1] = IF2 */
u16 _reserved2[8];
u16 txrqst1;
u16 txrqst2;
u16 _reserved3[6];
u16 newdat1;
u16 newdat2;
u16 _reserved4[6];
u16 intpnd1;
u16 intpnd2;
u16 _reserved5[6];
u16 msgval1;
u16 msgval2;
u16 _reserved6[6];
};
/* c_can private data structure */
struct c_can_priv {
struct can_priv can; /* must be the first member */
struct napi_struct napi;
struct net_device *dev;
int tx_object;
int current_status;
int last_status;
u16 (*read_reg) (struct c_can_priv *priv, void *reg);
void (*write_reg) (struct c_can_priv *priv, void *reg, u16 val);
struct c_can_regs __iomem *regs;
unsigned long irq_flags; /* for request_irq() */
unsigned int tx_next;
unsigned int tx_echo;
void *priv; /* for board-specific data */
};
struct net_device *alloc_c_can_dev(void);
void free_c_can_dev(struct net_device *dev);
int register_c_can_dev(struct net_device *dev);
void unregister_c_can_dev(struct net_device *dev);
#endif /* C_CAN_H */
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